Funding Sources: The study was funded by the National Heart, Lung, and Blood Institute NHLBI supported by the MESA study contracts RO1-HL-66075, NO1-HC-9808, N01-HC-95162, NO1-HC-95168, and NO1-HC-95169. Dr. Armstrong was funded by Universidade Federal do Vale do São Francisco UNIVASF, Petrolina, PE, Brazil.
Left Ventricular Mass and Hypertrophy by Echocardiography and Cardiac Magnetic Resonance: The Multi-Ethnic Study of Atherosclerosis
Article first published online: 10 AUG 2013
© 2013. This article is a U.S. Government work and is in the public domain in the USA.
Volume 31, Issue 1, pages 12–20, January 2014
How to Cite
- Issue published online: 3 JAN 2014
- Article first published online: 10 AUG 2013
- National Heart, Lung, and Blood Institute NHLBI
- MESA. Grant Numbers: RO1-HL-66075, NO1-HC-9808, N01-HC-95162, NO1-HC-95168, NO1-HC-95169
- Universidade Federal do Vale do São Francisco UNIVASF
- left ventricular mass;
- left ventricular hypertrophy;
- image quality
Left ventricular mass (LVM) and hypertrophy (LVH) are important parameters, but their use is surrounded by controversies. We compare LVM by echocardiography and cardiac magnetic resonance (CMR), investigating reproducibility aspects and the effect of echocardiography image quality. We also compare indexing methods within and between imaging modalities for classification of LVH and cardiovascular risk.
Multi-Ethnic Study of Atherosclerosis enrolled 880 participants in Baltimore city, 146 had echocardiograms and CMR on the same day. LVM was then assessed using standard techniques. Echocardiography image quality was rated (good/limited) according to the parasternal view. LVH was defined after indexing LVM to body surface area, height1.7, height2.7, or by the predicted LVM from a reference group. Participants were classified for cardiovascular risk according to Framingham score. Pearson's correlation, Bland–Altman plots, percent agreement, and kappa coefficient assessed agreement within and between modalities.
Left ventricular mass by echocardiography (140 ± 40 g) and by CMR were correlated (r = 0.8, P < 0.001) regardless of the echocardiography image quality. The reproducibility profile had strong correlations and agreement for both modalities. Image quality groups had similar characteristics; those with good images compared to CMR slightly superiorly. The prevalence of LVH tended to be higher with higher cardiovascular risk. The agreement for LVH between imaging modalities ranged from 77% to 98% and the kappa coefficient from 0.10 to 0.76.
Echocardiography has a reliable performance for LVM assessment and classification of LVH, with limited influence of image quality. Echocardiography and CMR differ in the assessment of LVH, and additional differences rise from the indexing methods.